<|begin_of_text|><|start_header_id|>system<|end_header_id|>Calculate the total emissions change based on activity and energy intensity changes.<|eot_id|><|start_header_id|>user<|end_header_id|>Activity contribution: 25%; Energy intensity contribution: 13%.<|eot_id|><|start_header_id|>assistant<|end_header_id|>The total emissions change is 38%.<|eot_id|>